Rip strip container



1944- H. SCHRADER ET AL 2,365,112

RIP STRIP CONTAINER Filed March 17, 1943 I L V m 1.. j 5

5- 1 J 'LU" .1;

I? Q L wmwmw 45- Patented Dec. 12, 1944 RIP STRIP CONTAINER HerbertSchrader and Bruce B. Gordon, Wheellug, W. Va., asslgnors to ContinentalCan Company', Inc.,New York, N. Y.,

New York a corporation of -Applica'tlon l \jiarch 17, 1943, Serial No.479,502 3 Claims. (1220-54) The invention relates generally to metallicreceptacles and primarily seeks to provide a container structureembodying a novel rip strip equipment.

' Containers equipped with rip strips defined by' score weakened linesabout the container bodies and terminating in tongue extensions intendedto be wound on keys for tearing out the rip stripand opening thecontainer are well known, but in such containers some difllculty hasbeen experienced in effecting an efficient sealing of the container atthe position at which the rip strip extends from the side seam, it beingnecessary to break the continuity of one of the hooks in order toprovide the rip strip key receiving tongue extension. This difllculty isaccentuated when it is attempted to incorporate a rip strip equipment ina container having 2. doped side seam in which the seal is effected bythe dope between the interlocking seamhook portions instead of the usualsolder bonding, and it has been impractical, heretofore, to provide asatisfactory container structure of this type. It is the broad purposeof the present invention to provide a container structure in which theproblems mentloned are solved and in which practical provision for therip strip equipment is made with assurance of an eflicient sealthroughout the length of the seam even in cases in which the seam isdoped only and not solder bonded.

An object of the invention is to provide, in a container having a sideseam structure including a lock portion formed by the interlocking ofinner and outer hooks, a rip strip equipment comprising score linesextending around the container body and defining the rip strip, and awinding key receiving tongue extending from the side seem in line withand as a .part of the rip strip and folded upon itself in the seam so asto avoid interrupting the continuity of the seam lock portion at theposition of the rip strip.

Another object of the invention is to provide a container structure ofthe character stated in which the side seam structure is composed ofinterlocking hooks extending the full length or substantially the fulllength of the container and is sealed by a, dope incorporated betweentht interocking hooks, and in which the winding key receiving tongueextends from the outer hook which is slit transversely throughout itsdepth so as to place the base of the tongue at the juncture of the hookwith the container body and thus free said .tongue so that it canreadily be pulled out of the seam intowhich it has been folded when thecontainer is opened by winding of the rip strip on the key.

Another object of the invention is to provide a container structure ofthe character stated in which the interlocked hooks are held againstrelative movement in a seam opening, body collapsing direction bypresenting the. seam outwardly of the body circle, thereby providinga'hook m'vement preventing heel or shoulder and an uninterruptedcylindrical chamber within the container, and by providing an outwardlypressed head or rib along the side of the seam in position forcooperating with said heel or shoulder in holding the hooks ininterlocked-relation Another object of the invention is to provide acontainer of the" character stated in which the hook confining rib orbead terminates against and at each side of the winding key receivingtongue so as to facilitate the provision of an eflicient seal at thelocation of the tongue and also provide a clearance throogh which saidtongue projects.

With the above and other objects in view that will hereinafter appear,the nature of the invention will be more fully understood by followingthe detailed description, the appended claims and the several viewsillustrated in the accompanying drawing.

In the drawing:

Figure 1 is a plan view of a blank from which the body of the containercan be formed.

Figure 2 is an end elevation of the blank with the hooks bent to shape.

Figure 3 is a side elevation of a completed container embodying theinvention.

Figure 4 isan enlarged fragmentary cross sectional view taken on theline 4- -4 on Figure 3.

Figure 5 is an enlarged fragmentary cross sectional view taken on theline 5-5 on Figure 3.

In the example of embodiment of the invention herein illustrated thecontainer body is formed from a sheet metal blank as is disclosed indetail in Figures 1 and 2. The blank 5 is equipp d with rip stripdefining score lines 6 and a rip strip tongue extension 1 extending fromone side of the blank in line with the score line defined rip strip. Atthe position of the rip strip tongue extension, the blank edgepreferably is transversely slit throughout the depth of the hook to beformed in that edge portion of the blank as indicated at 8 so as toplacethe base of the tongue at the juncture of the hook with the containeribody proper. The base of the hook at the side of the blank from whichthe tongue I projects is indicated by the fold line 9, and the comparablfold line at the opposite side of the blank is indicated at l0. it beingunderstood that when the hooks are folded in the usual manner along thefold lines 9 and ill the provision of outer and inner hooks respectivelydesignated at H and I! will result. While it is preferred that the blankbe slit as at 8 so as to completely free the inner extremity of thetongue I, it should be understood that the invention is broad enough toembrace mere weakening of the body metal at the position of the slits 8so as to permit tearing or ripping out of the inner extremity of thetongue 1 rather than complete freeing thereof from the body metal at thehook portion.

when the can body is made up and the side seam thereof is formed bybringing the hooks together into interlocking relation in the mannerillustrated in Figures 3 and 4 the completed seam generally designatedI! will be provided throughout the length of the body generallydesignated N. This seam structure I?! preferably is formed in a mannerfor projecting the multiple thickness portions of the seam outwardly ofthe main body circle so as to provide an uninterrupted cylindricalinterior chamber in the container. The seam is completed by bumping inthe usual manner and during the formation of the seam an outwardlyextended rib i 5 is formed therein in position for lying closely againstthe side seam along one side thereof in the manner clearly illustratedin Figures 4 and 5.

The rib terminates as at It at each side of .the tongue projection I for[a purpose that will become apparent as this description progresses.

In the formation of the side seam the tongue extension 1 is folded intothe side seam in the manner clearly illustrated in Figures 3 and 5 ofthe drawing, the tongue being folded upon itself to form a rebentportion ll clamped in the side seam structure and formin a continuationof the interlocked portion of the outer seam hook II. The seam isefficiently sealed by a dope or sealing compound l8 incorporated withinthe interlocked portions of the hook, the dope being applied to theblank in any suitable manner prior to the making up of the finishedcanbody. Y

The outward projection of the seam structure as illustrated in Figures 4and 5 results in the provision of a heel or abutment shoulder l9extending along that portion of the side seam opposite the position ofthe bead or rib l5, and the rib l5 and the shoulder I9 cooperate in soconfining the hooks as to prevent separation thereof by movement of onehook out of the other.

It will be readily understood that should the winding key receivingtongue I be extended over the external surface of the body I4 by directprojection from the outermost thickness of the seam structure i3, thatis, from the base of the tongue or the juncture thereof with the mainbody of the container, the continuity of the interlocked portion of theouter hook Ii would be destroyed at the position of the tongue 1 andseam leakages would occur at this point. By folding the tongue uponitself in the seam structure in the manner clearly illustrated in Figure5 the continuity of the interlocked wall of the outer hook II ismaintained and leakages in the seam structures at the position of therip strip and tongue extension are avoided. When it is desired to openthe container, the key is applied to the tongue I in the usual mannerand by winding the tongue onto the key the tongue is first pulled freeof the rebent fold l1 incorporated in the seam structure and then therip strip proper will be ripped out progressively 1. In a container, 9.body having a side seam formed at least in part of interlocked hooks andscore lines extending about the body thereof at the position of saidinterlocked hooks and defining a rip strip, and a winding key receivingtongue extending from the defined rip strip and folded upon itself inand extending freely from the side seam, said tongue being extended fromthe outermost one of the interlocking hooksand defined in part by slitstraversing said outermost hook to and terminating at the juncturethereof with the body so as to leave the infolded part of the tonguefree to be pulled out of the seam upon winding of the tongue upon a keywhile maintaining an unbroken exterior along said side seam.

2. In a container, a body having a side seam formed at least in part ofinterlocked hooks and score lines extending about the body thereof atthe position of said interlocked hooks and defining a rip strip, and awinding key receiving tongue extending from the defined rip strip andfolded upon itself in and extending freely from the side seam, saidtongue being extended from the outermost one of the interlocking hooksand defined in part by slits traversing said outermost hook to andterminating at the juncture thereof with the body so as to leave theinfolded part of the tongue free to be pulled out of the seam uponwinding 01' the tongue upon a key while maintaining an unbroken exterioralong said side seam, and in which the interlocked hooks are sealed by adope incorporated in the seam structure.

3. A container structure as defined in claim 2 in which the seamstructure formed by the interlocked hooks projects outwardly from thebody so as to provide an uninterrupted cylindrical interior in thecontainer and an abutment shoulder at one side of the seam confining theinner hook against movement inwardly out of the outer hook, in whichthere is included an outwardly projected rib equipment at the side ofthe seam opposite the abutment shoulder and cooperating therewith inconfinin the hooks against movement out of each other, said ribterminating against and at each side of the infolded tongue so as toprovide a clearance for the projecting tongue and so as to crowd theinfolded tongue portion and facilitate the sealing of the seam at theposition thereof.

HERBERT SCHRADER. BRUCE B. GORDON.

